Heat the cream and milk in a sauce pan until just warm. Add sugar and stir until it dissolves, about five minutes. Remove mixture from heat and add rosewater. Put mixture in the fridge to chill for approximately 30 minutes, or until the mixture is no longer warm to the touch (overnight is even better if you have the time).

Remove the chilled mixture from the fridge and pour it in to the ice cream maker. Use the ice cream maker according to the manufacturer's directions for ice cream. Put the completed ice cream in the freezer for at least two hours (overnight is better if you have the time).